Development of the design and determination of the mode characteristics of the demineralizer for sea water
Abstract
The object of research is block low-temperature installations for obtaining fresh water.
Investigated problem: obtaining fresh water from sea using low-temperature technologies.
Main scientific results: the design is developed and the operating characteristics of the demineralizer for sea water are determined.
The influence of the initial salt content of sea water on the ice formation rate is determined. With an increase in the salinity of 3.5 times, productivity on ice decreases 2.3 times.
The kinetics of the salt content in the freezing solution depends on the initial concentration. With an initial salt content of 6.74 g/l, the process rate is 0.4 g/h, with a salt content of 1 g/l – 0.14 g/h
With an initial salt content of 6.74 g/l, the process of separating wastewater from the ice block is more intensive. The salt content of the first portion of the effluent is 3.2 times higher than the initial concentration of the solution.
A cryoscopic curve was obtained for seawater in the concentration range from 0 to 6.74 g/l.
The area of practical use of the research results: studies of the quality of the obtained water showed that the content of nitrates decreases 5 times, the hardness decreases by 2 mg/dm³. The salt content is reduced from 858 mg/dm³ to 560 mg/dm³.
Plants for the concentration of food liquids by the block freezing method are designed to produce environmentally friendly products that preserve the bioactive complex of raw materials as much as possible with minimal energy consumption.
An innovative technological product: design and operating modes of a block freezing plant for seawater desalination.
Scope of application of the innovative technological product: industrial enterprises, the technological process of which requires small volumes of fresh water; to obtain fresh water on oil platforms in the oceans; small hotels, boarding houses on the seaside.
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References
Lin, S., Zhao, H., Zhu, L., He, T., Chen, S., Gao, C., Zhang, L. (2021). Seawater desalination technology and engineering in China: A review. Desalination, 498, 114728. doi: http://doi.org/10.1016/j.desal.2020.114728
Elimelech, M., Phillip, W. A. (2011). The Future of Seawater Desalination: Energy, Technology, and the Environment. Science, 333(6043), 712–717. doi: http://doi.org/10.1126/science.1200488
Leijon, J., Boström, C. (2018). Freshwater production from the motion of ocean waves – A review. Desalination, 435, 161–171. doi: http://doi.org/10.1016/j.desal.2017.10.049
Xie, C., Zhang, L., Liu, Y., Lv, Q., Ruan, G., Hosseini, S. S. (2018). A direct contact type ice generator for seawater freezing desalination using LNG cold energy. Desalination, 435, 293–300. doi: http://doi.org/10.1016/j.desal.2017.04.002
Ong, C. W., Chen, C.-L. (2019). Technical and economic evaluation of seawater freezing desalination using liquefied natural gas. Energy, 181, 429–439. doi: http://doi.org/10.1016/j.energy.2019.05.193
Liu, Y., Ming, T., Wu, Y., de Richter, R., Fang, Y., Zhou, N. (2020). Desalination of seawater by spray freezing in a natural draft tower. Desalination, 496, 114700. doi: http://doi.org/10.1016/j.desal.2020.114700
Doornbusch, G., van der Wal, M., Tedesco, M., Post, J., Nijmeijer, K., Borneman, Z. (2021). Multistage electrodialysis for desalination of natural seawater. Desalination, 505, 114973. doi: http://doi.org/10.1016/j.desal.2021.114973
Voutchkov, N. (2018). Energy use for membrane seawater desalination – current status and trends. Desalination, 431, 2–14. doi: http://doi.org/10.1016/j.desal.2017.10.033
Alawad, S. M., Khalifa, A. E. (2021). Performance and energy evaluation of compact multistage air gap membrane distillation system: An experimental investigation. Separation and Purification Technology, 268, 118594. doi: http://doi.org/10.1016/j.seppur.2021.118594
Fujiwara, M., Takahashi, K., Takagi, K. (2021). Improvement of condensation step of water vapor in solar desalination of seawater and the development of three-ply membrane system. Desalination, 508, 115051. doi: http://doi.org/10.1016/j.desal.2021.115051
Rich, A., Mandri, Y., Mangin, D., Rivoire, A., Abderafi, S., Bebon, C. et. al. (2012). Sea water desalination by dynamic layer melt crystallization: Parametric study of the freezing and sweating steps. Journal of Crystal Growth, 342 (1), 110–116. doi: http://doi.org/10.1016/j.jcrysgro.2011.03.061
Burdo, O. H., Reminna, L. P., Kovalenko, O. O. (2008). Pat. No. 34280 UA. Sposib otrymannia kontsentrovanykh ridkykh produktiv shliakhom vymorozhuvannia. MPK: A23L 2/08. No. u200801496; declareted: 05.02.2008; published: 11.08.2008, Bul. No. 15. Available at: https://uapatents.com/3-34280-sposib-otrimannya-koncentrovanikh-ridkikh-produktiv-shlyakhom-vimorozhuvannya.html
Copyright (c) 2021 Oleg Burdo, Igor Bezbakh, Yana Fatieieva, Aleksandr Zykov, Petr Osadchuk, Igor Mazurenko, Shao Zhengzheng, Lyudmila Phylipova
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